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There are 78 new cases of Covid-19, including 73 confirmed cases and five new probable cases, Director General of Health Ashley Bloomfield says. The new cases bring the total number of confirmed or probable infections to 283.

Police have paid a visit to a bargain store this morning to discuss whether it should be open during the nationwide lockdown.

Crackerjack in Hamilton was open for walk-in customers this morning, the first day of a month-long lockdown designed to stop the spread of Covid-19 in New Zealand. Other stores owned by the company were also open in Auckland.

Police officers at the scene would not comment. The company did not respond to calls.

Some of the company's employees questioned whether it was an essential service, and said they did not feel safe working during the lockdown. A handful of workers had quit, and others were threatening to.

In an email to staff obtained by the Herald, CEO Craig Faulkner said the company was classified as an essential service because 70 per cent of its stock was hygiene, cleaning, food and grocery products.

"As you can imagine, it has been a huge decision for us to decide if we trade during the government-enforced self-isolation lockdown.

"We decided that if we can assist the public with supplying essential cleaning, sanitising and food items, we have an obligation to the community to continue trading."

Faulkner also outlined a number of safety precautions that were being taken, including regular cleaning and a one-in, one-out policy.

"We can't keep a 2m distance at the till, there are no barriers. We have only been given hand sanitiser and wipes, and the floors have been marked with yellow tape."

An online petition calling for Crackerjack stores to be closed has been signed by 800 people.

On its website, the company is advertising cleaning and disinfectant products and says that it is supplying frontline services.

An employee said she didn't want to work during the lockdown. Photo / Mike Scott

"We are currently working closely with NZ Police, funeral directors, midwives and health care providers to help keep them supplied with sanitiser, face masks, disinfectant and cleaning supplies."

The Warehouse, which has a similar product range, was told by the Ministry of Business, Innovation and Employment (MBIE) that it could not open during the lockdown. It initially believed it would be categorised as essential services because it sold groceries, toiletries, cleaning products and clothing.

The worker from the Auckland store said she did not believe Crackerjack qualified as essential services: "We sell the same stuff as the Warehouse."

As the lockdown approached, industries lobbied the Government to be categorised as essential services. Liquor stores, bakeries, butchers were among those who failed to convince MBIE they needed to stay open.